Clair-de-Lune lives for dancing, and that's all she has lived for her whole life. She has mastered the art of it; what more could she want? Her heart is still not content though, for she longs to speak the words of her heart just like everyone else, but she cannot because she is mute. One day she meets a mouse named Bonaventure while weeping in the dance room and surprisingly, he could talk. Bonaventure takes Clair-de-Lune to the monastery where she meets a man named Brother Inchmahome, who tells her that he can teach her how to speak. Clair-de-Lune has second thoughts about learning how to do the thing she's been wanting to do all her life, but why is that? One day she gets a job offer to perform in the same play that her mother had died performing in and she accepts. One night she goes down to the stage while wearing her mother's swan tutu and after practicing she leaves without realizing that the locket her mother had sewn onto the tutu has fallen off onto the stage. What will happen if she never finds the locket that she has lost?